As long as it's not from a Mondeo - yes.
Connections are the same - quadlock - but the mondeo radio is deeper ( the mounting spike at the back is much shorter too) and the fascia is angled to match the dash apeture.
Easiest way to tell is to look at the front of the radio, if the grey trim around the fascia looks wider at the top than the bottom it's from a mondeo.
If it's an even rectangular shape all around the radio then it will be fine.
Actually just bidding on one from eBay right now.
Mondeo one -
[url="http://www.ebay.co.uk/itm/FORD-SONY-6-DISC-CD-CHANGER-HEAD-UNIT-GOOD-WORKING-ORDER-CODE-/180831721612?pt=UK_In_Car_Technology&hash=item2a1a69188c"]http://www.ebay.co.uk/itm/FORD-SONY-6-DISC-CD-CHANGER-HEAD-UNIT-GOOD-WORKING-ORDER-CODE-/180831721612?pt=UK_In_Car_Technology&hash=item2a1a69188c[/url]
Focus / Fiesta one -
[url="http://www.ebay.co.uk/itm/sony-6-disc-ford-fitting-/230751108715?pt=UK_In_Car_Technology&hash=item35b9d67e6b"]http://www.ebay.co.uk/itm/sony-6-disc-ford-fitting-/230751108715?pt=UK_In_Car_Technology&hash=item35b9d67e6b[/url]
This is the one i'm bidding on- [color=#FF0000]paws off please

[/color]
Hope that's helpful.